Stove



April 2, 1929. 1.. SCRUGGS 1,707,818

STOVE Filed April 11, 1927 2 Sheets-Sheet 1 lNVENTOFE Efren/van;

L. SCRUGGS April 2, 1929.

STOVE Filed April 11, 1927 2 Sheets-Sheet lA/VEINTOE 4 56/6. BY W ATTOIe/VE Y5 Patented Apr. 2, 1929.

LOYD SCRUGGS, OF UNIVERSITY CITY, MISSOURI.

STOVE.

Application filed April 11,

This invention relates to stoves of the type which are equipped with a substantially oblong-shaped combustion chamber or grate,

i. e., a combustion chamber or grate whose width is materially greater than its depth, or vice versa.

One object of my invention is to provide a stove of the general type mentioned,which is provided with a novel means for causing the fuel in the combustion chamber to burn substantially uniformly throughout its entire area. 1

Another object-of my invention is to provide a stove of the general type mentioned, which is of such design that the end walls of the combustion chamber and a smoke box at the upper end of said combustion chamber, will be heated to a degree high enough to efficiently heat air that circulates over said parts.

Another object of my invention is to provide a combined smoke outlet box and heat radiator for stoves and the like, that is equipped with an easily removable member that causes the suction created by the flue, chimney or other suction-producing means, to be exerted on the fuel'in such a way as to insure vigorous combustion or burning of the fuel at the opposite ends of the fuel bed, as well as the central portion of the fuel bed.

And still another object of my invention is i to reduce the cost of manufacture and increase the efiiciency of stoves of the type commonly referred to as circulators which comprise an ash pit, fire pot and combustion chamber arranged inside of an outer casing and spaced away from-same so as to form a circulating passageway for air that absorbs 1381, from the walls of the combustion cham- Figure 1 of the drawings is a front elevational view, illustrating my invention embodied in a stove of the type in which the combustion chamber is arranged inside of and spaced away from an outer casing, so as to form an air circulating passageway, the outer casing being omitted so'as to more clearly show the construction of the elements arranged inside of said casing.

Figure 2 is a side elevational view of the elements shown in Figure 1.

Figure 3 is a top plan view of said elements, partly broken away. Figure 4 is a horizontal sectional view of the removable member of the smoke box in which the twin smoke outlets are formed.

1927. Serial No. 182,869.

Figure 5 is a front elevational view of said member; and p Figure 6 is a transverse sectional view of said member, illustrating it arranged in operative position in the smoke box.

have herein illustrated my invention embodied in a heating stove of the kind commonly referred to as circulators, in which the combustion chamber is substantially oblong-shaped and is arranged inside of an outer cas1ng in such a way as to forma circulatlng passageway for air that absorbs heat which radiates from the walls of the.

combustion chamber. lustrate the invention, not been shown in the of course, be understood that the complete stove is equipped with an outer casing of the kind now generally used in heaters of the circulating type. I wish it to be understood, however, that my invention is applicable to various other types and kinds of stoves and also to various other types and kinds of structures in which fuel is burned.

In the accompanying drawings which illustrate one form of my invention, A designates the combustion chamber of the stove, which is of materially greater width than depth and of oblong shape in general outline.

In order to clearly iithe outer casing has Said combustion chamber may be of any preferred height, it may be of any preferred construction, and, as previously stated, it is intended to be arranged inside of an outer casing (not shown). In the stove herein illustrated the lower port-ion of the combustion chamber is formed by a castmetal fire pot 1, and the upper portion of said combustion chamber is formed principally by an oblong-shaped sheetmetal casing 2 whose top wall 3 is joined to its vertical walls by rivets 4. The fire pot 1 is mounted upon an ash pit 5 that is constructed from sheettmetal members joined together by rivets 6.

Instead of providing the combustion chamber with a single, smoke outlet that causes the suction created by the chimney or other suction-producing means to be exerted principally on the central portion of the fuel bed, as has heretofore been the universal custom in stoves equipped with substantially oblong-shaped fire pots or combustion chambers, I provide the'combustion chamberA of my stove with a smoke outlet whichis of such design that the suction will be exerted on the end portions of the fuel bed, as well as on the central portion of the centrally-disposed 1,707,818: T OFFICE. I

drawings, but it will,

fact that the end walls of the combustion chamber over which air circulates, are in close proximity to vigorously burning fuel,

and also due to the fact that the fire gases circulate upwardly over said endwalls 1n escapmg let. Moreover, as the fuel bed glows throughout its entire width, the stove pre sentsa cheerful appearance when the front wall of the combustion chamber is provided with doors 7 equlpped with transparent panels'8, as is the usual custom with stoves that 7 thereby causing said parts to be maintained areintended to be used in homes and dwellings.

The stove herein illustrated, which represents the preferred form of my invention, is equipped with what I will term a twin smoke outlet produced by two smoke outlets 9 located in the rear wall of the combustion chamber A adjacent the upper end of same for establishing communication between said combustion chamber, and the interior of a combined heat radiator and smoke box 10 from which a pipe 11 leads to the flue or chimney (not shown), said smoke box and radiator preferably consisting of an oblongvshaped sheet metal box secured to the rear wall of the combustion chamber. The twin smoke outlets 9 are arranged at opposite sides of the center of the combustion cham- 'ber,'as shown in full lines and in broken lines in Figure 1, and when the stove is in operation, the suction produced by the flue will be exerted directly on the end portions of the fuel bed, thereby causing the fuel to burn brightly throughout the entire width of the combustion chamber in such a way that the fire gases will circulate upwardly overthe end walls of the combustion chamber and then pass into the smoke box 10,

at a sufliciently high temperature to efficiently heat the air which circulates through the outer casing of the structure. I Due to the fact that the portion of the combustion chamber in which the smoke outlets 9 are formed is subjected to intense heat, it is preferable to form the smoke outlets 9 in a cast metal member B that is arranged at the inner side of the smoke box 10, so as to virtually form a portion of the rear wall of the combustion chamber that separates the interior of said chamber from the smoke box. The member B can be mounted in any prethe inner faces of to the smoke out-v desired, one or more removable retaining pins 13 can he slipped downwardly through aligned holes in the top and bottom walls of the smoke b x10, and in the flanges 12 on the member B so as to securely hold the member B in operative position, but'still enable it to be removed easily simply by withdrawingg the pin 13, then reaching into the combustion chamber and grasping the member B, and thereafter pulling said member forwardly out of the smoke box.

The stove can be provided with any preferred type of valves or dampers for regulating the supply of air to the, combustion chamber. In the stove herein shown the door 5 'of the ,ashpit is equipped with air admission openings 14 that are controlled by a damper 15 which is adapted to be arranged in its open position, so as to admit considerable air to the ash pit at a point under the grate when a fire is being started in the stove. After the fuel has started to burn freely, the air that is used to support combustion is admitted to the combustion chamber A by a hot blast pipe 16, shown in broken lines in Figure 1, that projects downwardly from the top wall of the combustion chamber and which is provided at its upper end with a damper or regulating valve 17, as shown in Figure 3. A check draft 18 of'conventional construction is preferably mounted in the top wall of the smoke box 10.

It is immaterial how the, combustion. chamber is constructed, or how the combined heat radiator and smoke outlet is constructed, so long as the stovewill produce the results previously described, but I prefer toprovide the combustion chamber with an upper portion formed principally from sheet metal members thatcanbe easily connected together, so as to produce tight jointsbetween the members composing same without the use of cement. Such a combustion chamber is inexpensive to manufacture, the walls of same will throw off more heat than walls constructed of cast metal, and it is not liable to crack or break when the stove is in transit or when it is in use. The ash pit, which is also constructed of sheet metal members, has these same desirable characteristics.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1., A stove provided with a substantially oblong-shaped combustion chamber, a substantially oblong-shaped smoke box attached to the upper end of the rear wall of said combustion chamber, a removable partition member provided with flanges that fit inside of said smoke box, and a smoke out-let in said partition member, adjacent each end thereof 7 and an end wall of the combustioncha-mber.

2. A stove, comprising a. sheet metal ash pit, a sheet metal casing arranged above said fire pot so as to form the upper portion of the combustion chamber of the stove, a sheet metal smoke box connected to the rear wall of said casing, and a cast metal partition member removably mounted in said smoke box and provided with a smoke outlet adjacent each end and an adjacent wall of the combustion chamber.

3. A stove, comprising an ash pit formed from sheet metal members riveted together, a cast metal fire pot combined with said ash pit, a combustion chamber arranged above said fire pot and composed of sheet metal members riveted together, said combustion chamber being substantially oblong-shaped in outline, a substantially oblong-shaped smoke box attached to the rear wall of the combustion chamber, a cast metal removable partition member provided with flanges that fit inside of said smoke box, and a smoke outlet in said partition member arranged at opposite sides of the center line of the combustion chamber. v

4. A stove provided with a substantially oblong-shaped combustion chamber arranged transversely of the stove, a substantially oblong-shaped smoke box arranged horizontally behind the rear wall of the combustion chamber, and a vertically-disposed, trans- 

